Improvement in paper-cutting machines



FRANK A. FLETCHER.

lmprovmentin 'Pap'er Cutting Machines.

@l j E r 4n puera-umoamrmc m mx/assannrk moon-s.)

UNITED STATES PATENT OFFICE.

IMPROVEMENT IN PAPER-CUTTING MACHINES.

Specification forming part of Letters Patent No. 121,239, dated November 28, 1871.

To all whom it may concern: 4

Be it known that I, FRANK A. FLETCHER, of Newark, in the county of New Castle and State of Delaware, have invented certain Improvements in PapenGutting Machines, of which the following is a specification:

My invention relates to the paper-cutter known as the straight-knife or continuous-feed cutter that is, a cutter which cuts the paper into sheets from a web of the same while in motion. The objection to the above-named cutters is that they do not cut the sheets of paper square. The two cutting-knives are straight and the revolving knife is set shearing-that is, so set in position that one end begins to out against the ledger or stationary knife some distance in advance of the other. The Web of paper is continually descending between the knives, therefore that portion of the sheet which is last out off must be of the greatest length. By my invention, which consists of an adjustable attachment to theledgerknife, and which holds the web of paper up at the desired point, and which may be elevated or depressed as the length of the sheet to be out may require,-the sheets may always be cut perfectly square.

Figure 1 is an end elevation, showing the end of the machine embodying my invention. Fig. 2 is a plan of the ledger-knife with my invention attached.

A A is the frame of the machine. B is the revolving knife. D is the ledger or stationary knife.

. E E are rollers which draw the web of paper from the roll F and pass it between the knives B and D. F is aroll of paper to be out into sheets. H H His the web of paper. I is a flexible metallic plate, extending nearly or quite the entire length of and attached to the upper portion of the ledger-knife, so that the lower edge may be adjusted so as to draw back or lift up that portion of the web of paper which is last severed with the knives. When the length of the sheet is changed for two inches or more, (either longer or shorter, as the case may be,) the plate I should be elevated or depressed, as the case may require, until the sheet is made to out perfectly square.

I claim as my invention The application and use of the flexible metallic plate I, substantially as and for the purpose hereinbefore set forth.

FRANK A. FLETCHER.

Witnesses:

SoLoMoN S. M. CURTIS,

WARREN CURTIS. (1 09) 

